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GP makes XP logon slow-a question beyond the usual solution

It is known that set "computer\administrative template\systems\logon\always wait for the network at computer startup and logon" to enable solves the slow logon problem most of the times. The question is what really slows down the computer startup. The userenv debug log did not give me much insights, so I began to reverse settings in the offending GPO appled to an ou containing the computer and, not long, found "computer\windows settings\security settings\file system" is the culprit. When I delete all the file system objects there, the startup of the computer is normal with the "....wait for the network..." set to disable. My guess is someone who really knows MS file system DACL and SACL can most likely provide some insight.

Any help is appreciated.

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karlour
Asked:
karlour
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JamesDSCommented:
karlour
When you set an ACL from a GPO in that way, it effectively wipes the existing rights and re-applies an ACL from the root down (or wherever you started from) every time the GPO is run.

If there is a large number of files and folders in the area being ACl'd then the ACL will take a long time to apply and hence delay startup.

I suggest you run this ACL at server build time, not during execution of a GPO

Cheers

JamesDS
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karlourAuthor Commented:
JamesDS:

Thank you for the input. In my test, even with one entry in that container will cause the system to delay at the boot. Though I understand that every file and folder down that directory tree will be affected, I believe these chnages are mostly bit switch changes. I suspect the system is waiting for something rather than busy applying ACLs.

Regards,

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JamesDSCommented:
karlour
It is possible that the ACL isn't actually being applied and the GPO is simply timing out. Typical timeout settings are 60 seconds on a GPO. You should check that permissions are actually being applied.

I wouldn't say an ACL is simply a bitswitch change as each ACE is re-written in RAM, re-ordered correctly into an ACL and then the changes are committed to the NTFS - for every object being affected. This is not a quick process in comparision to other type of GPO Processing.

Cheers

JamesDS
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